jose477
15.07.2020 •
Mathematics
The figure below shows a right triangle: what is p\r equal to
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Ответ:
so total ways = 420
odd # 4 ways of ending digit, 5 ways for 1st digit, 5*4 for middle digits = 400 ways
< 4000: 3 ways for starting digit, 6*5*4 ways for remaining digits = 360 ways
> 3000 & < 4000 1 way for starting digit , 6*5*4 for remaining digits = 120 ways